Answer:
There are 27 males & 18 females in the class
Step-by-step explanation:
Suppose,
m=number of males
f = number of females
Given that,
The number females is 9 less than the number of males
∴ f = m-9 ... ... ... (1)
and total students =45
∴ m+f =45
⇒ m+(m-9) = 45 [From (1)]
Add like terms
2m-9=45
Add 9 to both sides
2m=45+9
⇒2m = 54
Divide both sides by 2
m = 54/2
∴m=27
∴There are 27 males in the class.
now,
f = m-9 [From (1)]
⇒f = 27-9 [∵m=27]
∴m= 18
∴There are 18 females in the class
